2003 Chevy Malibu

Is your check engine light on? First disconnect one of the plug wires and place a screwdriver into the plug wire and while holding the handle of the screwdriver, place the metal shaft close to something that is grounded like a bolt and have someone try and start the car. If the ignition is working you should see a nice blue spark to ground. If you have spark then it is most likely fuel related. If you don't have spark, you may want have your ingniton module tested, they are rather pricy at 144 dollars at most parts stores and is located under the coil packs. If you have a test light you can disconnect the test light to the connections where the coil would be sitting, when you attempt to start the car you sould see the test light flash, if it doesn't then it is most likely the module that is bad.